#if 0
/*
 * Dirent interface for Microsoft Visual Studio
 * Version 1.21
 *
 * Copyright (C) 2006-2012 Toni Ronkko
 * This file is part of dirent.  Dirent may be freely distributed
 * under the MIT license.  For all details and documentation, see
 * https://github.com/tronkko/dirent
 */
#ifndef DIRENT_H
#define DIRENT_H

/*
 * Define architecture flags so we don't need to include windows.h.
 * Avoiding windows.h makes it simpler to use windows sockets in conjunction
 * with dirent.h.
 */
#if !defined(_68K_) && !defined(_MPPC_) && !defined(_X86_) && !defined(_IA64_) && !defined(_AMD64_) && defined(_M_IX86)
#   define _X86_
#endif
#if !defined(_68K_) && !defined(_MPPC_) && !defined(_X86_) && !defined(_IA64_) && !defined(_AMD64_) && defined(_M_AMD64)
#define _AMD64_
#endif

#include <stdio.h>
#include <stdarg.h>
#include <windef.h>
#include <winbase.h>
#include <wchar.h>
#include <string.h>
#include <stdlib.h>
#include <malloc.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <errno.h>

/* Indicates that d_type field is available in dirent structure */
#define _DIRENT_HAVE_D_TYPE

/* Indicates that d_namlen field is available in dirent structure */
#define _DIRENT_HAVE_D_NAMLEN

/* Entries missing from MSVC 6.0 */
#if !defined(FILE_ATTRIBUTE_DEVICE)
#   define FILE_ATTRIBUTE_DEVICE 0x40
#endif

/* File type and permission flags for stat(), general mask */
#if !defined(S_IFMT)
#   define S_IFMT _S_IFMT
#endif

/* Directory bit */
#if !defined(S_IFDIR)
#   define S_IFDIR _S_IFDIR
#endif

/* Character device bit */
#if !defined(S_IFCHR)
#   define S_IFCHR _S_IFCHR
#endif

/* Pipe bit */
#if !defined(S_IFFIFO)
#   define S_IFFIFO _S_IFFIFO
#endif

/* Regular file bit */
#if !defined(S_IFREG)
#   define S_IFREG _S_IFREG
#endif

/* Read permission */
#if !defined(S_IREAD)
#   define S_IREAD _S_IREAD
#endif

/* Write permission */
#if !defined(S_IWRITE)
#   define S_IWRITE _S_IWRITE
#endif

/* Execute permission */
#if !defined(S_IEXEC)
#   define S_IEXEC _S_IEXEC
#endif

/* Pipe */
#if !defined(S_IFIFO)
#   define S_IFIFO _S_IFIFO
#endif

/* Block device */
#if !defined(S_IFBLK)
#   define S_IFBLK 0
#endif

/* Link */
#if !defined(S_IFLNK)
#   define S_IFLNK 0
#endif

/* Socket */
#if !defined(S_IFSOCK)
#   define S_IFSOCK 0
#endif

/* Read user permission */
#if !defined(S_IRUSR)
#   define S_IRUSR S_IREAD
#endif

/* Write user permission */
#if !defined(S_IWUSR)
#   define S_IWUSR S_IWRITE
#endif

/* Execute user permission */
#if !defined(S_IXUSR)
#   define S_IXUSR 0
#endif

/* Read group permission */
#if !defined(S_IRGRP)
#   define S_IRGRP 0
#endif

/* Write group permission */
#if !defined(S_IWGRP)
#   define S_IWGRP 0
#endif

/* Execute group permission */
#if !defined(S_IXGRP)
#   define S_IXGRP 0
#endif

/* Read others permission */
#if !defined(S_IROTH)
#   define S_IROTH 0
#endif

/* Write others permission */
#if !defined(S_IWOTH)
#   define S_IWOTH 0
#endif

/* Execute others permission */
#if !defined(S_IXOTH)
#   define S_IXOTH 0
#endif

/* Maximum length of file name */
#if !defined(PATH_MAX)
#   define PATH_MAX MAX_PATH
#endif
#if !defined(FILENAME_MAX)
#   define FILENAME_MAX MAX_PATH
#endif
#if !defined(NAME_MAX)
#   define NAME_MAX FILENAME_MAX
#endif

/* File type flags for d_type */
#define DT_UNKNOWN 0
#define DT_REG S_IFREG
#define DT_DIR S_IFDIR
#define DT_FIFO S_IFIFO
#define DT_SOCK S_IFSOCK
#define DT_CHR S_IFCHR
#define DT_BLK S_IFBLK
#define DT_LNK S_IFLNK

/* Macros for converting between st_mode and d_type */
#define IFTODT(mode) ((mode) & S_IFMT)
#define DTTOIF(type) (type)

/*
 * File type macros.  Note that block devices, sockets and links cannot be
 * distinguished on Windows and the macros S_ISBLK, S_ISSOCK and S_ISLNK are
 * only defined for compatibility.  These macros should always return false
 * on Windows.
 */
#if !defined(S_ISFIFO)
#   define S_ISFIFO(mode) (((mode) & S_IFMT) == S_IFIFO)
#endif
#if !defined(S_ISDIR)
#   define S_ISDIR(mode) (((mode) & S_IFMT) == S_IFDIR)
#endif
#if !defined(S_ISREG)
#   define S_ISREG(mode) (((mode) & S_IFMT) == S_IFREG)
#endif
#if !defined(S_ISLNK)
#   define S_ISLNK(mode) (((mode) & S_IFMT) == S_IFLNK)
#endif
#if !defined(S_ISSOCK)
#   define S_ISSOCK(mode) (((mode) & S_IFMT) == S_IFSOCK)
#endif
#if !defined(S_ISCHR)
#   define S_ISCHR(mode) (((mode) & S_IFMT) == S_IFCHR)
#endif
#if !defined(S_ISBLK)
#   define S_ISBLK(mode) (((mode) & S_IFMT) == S_IFBLK)
#endif

/* Return the exact length of d_namlen without zero terminator */
#define _D_EXACT_NAMLEN(p) ((p)->d_namlen)

/* Return number of bytes needed to store d_namlen */
#define _D_ALLOC_NAMLEN(p) (PATH_MAX)


#ifdef __cplusplus
extern "C" {
#endif


/* Wide-character version */
struct _wdirent {
	/* Always zero */
	long d_ino;

	/* Structure size */
	unsigned short d_reclen;

	/* Length of name without \0 */
	size_t d_namlen;

	/* File type */
	int d_type;

	/* File name */
	wchar_t d_name[PATH_MAX];
};
typedef struct _wdirent _wdirent;

struct _WDIR {
	/* Current directory entry */
	struct _wdirent ent;

	/* Private file data */
	WIN32_FIND_DATAW data;

	/* True if data is valid */
	int cached;

	/* Win32 search handle */
	HANDLE handle;

	/* Initial directory name */
	wchar_t *patt;
};
typedef struct _WDIR _WDIR;

static _WDIR *_wopendir (const wchar_t *dirname);
static struct _wdirent *_wreaddir (_WDIR *dirp);
static int _wclosedir (_WDIR *dirp);
static void _wrewinddir (_WDIR* dirp);


/* For compatibility with Symbian */
#define wdirent _wdirent
#define WDIR _WDIR
#define wopendir _wopendir
#define wreaddir _wreaddir
#define wclosedir _wclosedir
#define wrewinddir _wrewinddir


/* Multi-byte character versions */
struct dirent {
	/* Always zero */
	long d_ino;

	/* Structure size */
	unsigned short d_reclen;

	/* Length of name without \0 */
	size_t d_namlen;

	/* File type */
	int d_type;

	/* File name */
	char d_name[PATH_MAX];
};
typedef struct dirent dirent;

struct DIR {
	struct dirent ent;
	struct _WDIR *wdirp;
};
typedef struct DIR DIR;

static DIR *opendir (const char *dirname);
static struct dirent *readdir (DIR *dirp);
static int closedir (DIR *dirp);
static void rewinddir (DIR* dirp);


/* Internal utility functions */
static WIN32_FIND_DATAW *dirent_first (_WDIR *dirp);
static WIN32_FIND_DATAW *dirent_next (_WDIR *dirp);

static int dirent_mbstowcs_s(
	size_t *pReturnValue,
	wchar_t *wcstr,
	size_t sizeInWords,
	const char *mbstr,
	size_t count);

static int dirent_wcstombs_s(
	size_t *pReturnValue,
	char *mbstr,
	size_t sizeInBytes,
	const wchar_t *wcstr,
	size_t count);

static void dirent_set_errno (int error);

/*
 * Open directory stream DIRNAME for read and return a pointer to the
 * internal working area that is used to retrieve individual directory
 * entries.
 */
static _WDIR*
_wopendir(
	const wchar_t *dirname)
{
	_WDIR *dirp = NULL;
	int error;

	/* Must have directory name */
	if (dirname == NULL  ||  dirname[0] == '\0') {
		dirent_set_errno (ENOENT);
		return NULL;
	}

	/* Allocate new _WDIR structure */
	dirp = (_WDIR*) malloc (sizeof (struct _WDIR));
	if (dirp != NULL) {
		DWORD n;

		/* Reset _WDIR structure */
		dirp->handle = INVALID_HANDLE_VALUE;
		dirp->patt = NULL;
		dirp->cached = 0;

		/* Compute the length of full path plus zero terminator */
		n = GetFullPathNameW (dirname, 0, NULL, NULL);

		/* Allocate room for absolute directory name and search pattern */
		dirp->patt = (wchar_t*) malloc (sizeof (wchar_t) * n + 16);
		if (dirp->patt) {

			/*
			 * Convert relative directory name to an absolute one.  This
			 * allows rewinddir() to function correctly even when current
			 * working directory is changed between opendir() and rewinddir().
			 */
			n = GetFullPathNameW (dirname, n, dirp->patt, NULL);
			if (n > 0) {
				wchar_t *p;

				/* Append search pattern \* to the directory name */
				p = dirp->patt + n;
				if (dirp->patt < p) {
					switch (p[-1]) {
					case '\\':
					case '/':
					case ':':
						/* Directory ends in path separator, e.g. c:\temp\ */
						/*NOP*/;
						break;

					default:
						/* Directory name doesn't end in path separator */
						*p++ = '\\';
					}
				}
				*p++ = '*';
				*p = '\0';

				/* Open directory stream and retrieve the first entry */
				if (dirent_first (dirp)) {
					/* Directory stream opened successfully */
					error = 0;
				} else {
					/* Cannot retrieve first entry */
					error = 1;
					dirent_set_errno (ENOENT);
				}

			} else {
				/* Cannot retrieve full path name */
				dirent_set_errno (ENOENT);
				error = 1;
			}

		} else {
			/* Cannot allocate memory for search pattern */
			error = 1;
		}

	} else {
		/* Cannot allocate _WDIR structure */
		error = 1;
	}

	/* Clean up in case of error */
	if (error  &&  dirp) {
		_wclosedir (dirp);
		dirp = NULL;
	}

	return dirp;
}

/*
 * Read next directory entry.  The directory entry is returned in dirent
 * structure in the d_name field.  Individual directory entries returned by
 * this function include regular files, sub-directories, pseudo-directories
 * "." and ".." as well as volume labels, hidden files and system files.
 */
static struct _wdirent*
_wreaddir(
	_WDIR *dirp)
{
	WIN32_FIND_DATAW *datap;
	struct _wdirent *entp;

	/* Read next directory entry */
	datap = dirent_next (dirp);
	if (datap) {
		size_t n;
		DWORD attr;
		
		/* Pointer to directory entry to return */
		entp = &dirp->ent;

		/* 
		 * Copy file name as wide-character string.  If the file name is too
		 * long to fit in to the destination buffer, then truncate file name
		 * to PATH_MAX characters and zero-terminate the buffer.
		 */
		n = 0;
		while (n + 1 < PATH_MAX  &&  datap->cFileName[n] != 0) {
			entp->d_name[n] = datap->cFileName[n];
			n++;
		}
		dirp->ent.d_name[n] = 0;

		/* Length of file name excluding zero terminator */
		entp->d_namlen = n;

		/* File type */
		attr = datap->dwFileAttributes;
		if ((attr & FILE_ATTRIBUTE_DEVICE) != 0) {
			entp->d_type = DT_CHR;
		} else if ((attr & FILE_ATTRIBUTE_DIRECTORY) != 0) {
			entp->d_type = DT_DIR;
		} else {
			entp->d_type = DT_REG;
		}

		/* Reset dummy fields */
		entp->d_ino = 0;
		entp->d_reclen = sizeof (struct _wdirent);

	} else {

		/* Last directory entry read */
		entp = NULL;

	}

	return entp;
}

/*
 * Close directory stream opened by opendir() function.  This invalidates the
 * DIR structure as well as any directory entry read previously by
 * _wreaddir().
 */
static int
_wclosedir(
	_WDIR *dirp)
{
	int ok;
	if (dirp) {

		/* Release search handle */
		if (dirp->handle != INVALID_HANDLE_VALUE) {
			FindClose (dirp->handle);
			dirp->handle = INVALID_HANDLE_VALUE;
		}

		/* Release search pattern */
		if (dirp->patt) {
			free (dirp->patt);
			dirp->patt = NULL;
		}

		/* Release directory structure */
		free (dirp);
		ok = /*success*/0;

	} else {
		/* Invalid directory stream */
		dirent_set_errno (EBADF);
		ok = /*failure*/-1;
	}
	return ok;
}

/*
 * Rewind directory stream such that _wreaddir() returns the very first
 * file name again.
 */
static void
_wrewinddir(
	_WDIR* dirp)
{
	if (dirp) {
		/* Release existing search handle */
		if (dirp->handle != INVALID_HANDLE_VALUE) {
			FindClose (dirp->handle);
		}

		/* Open new search handle */
		dirent_first (dirp);
	}
}

/* Get first directory entry (internal) */
static WIN32_FIND_DATAW*
dirent_first(
	_WDIR *dirp)
{
	WIN32_FIND_DATAW *datap;

	/* Open directory and retrieve the first entry */
	dirp->handle = FindFirstFileW (dirp->patt, &dirp->data);
	if (dirp->handle != INVALID_HANDLE_VALUE) {

		/* a directory entry is now waiting in memory */
		datap = &dirp->data;
		dirp->cached = 1;

	} else {

		/* Failed to re-open directory: no directory entry in memory */
		dirp->cached = 0;
		datap = NULL;

	}
	return datap;
}

/* Get next directory entry (internal) */
static WIN32_FIND_DATAW*
dirent_next(
	_WDIR *dirp)
{
	WIN32_FIND_DATAW *p;

	/* Get next directory entry */
	if (dirp->cached != 0) {

		/* A valid directory entry already in memory */
		p = &dirp->data;
		dirp->cached = 0;

	} else if (dirp->handle != INVALID_HANDLE_VALUE) {

		/* Get the next directory entry from stream */
		if (FindNextFileW (dirp->handle, &dirp->data) != FALSE) {
			/* Got a file */
			p = &dirp->data;
		} else {
			/* The very last entry has been processed or an error occured */
			FindClose (dirp->handle);
			dirp->handle = INVALID_HANDLE_VALUE;
			p = NULL;
		}

	} else {

		/* End of directory stream reached */
		p = NULL;

	}

	return p;
}

/* 
 * Open directory stream using plain old C-string.
 */
static DIR*
opendir(
	const char *dirname) 
{
	struct DIR *dirp;
	int error;

	/* Must have directory name */
	if (dirname == NULL  ||  dirname[0] == '\0') {
		dirent_set_errno (ENOENT);
		return NULL;
	}

	/* Allocate memory for DIR structure */
	dirp = (DIR*) malloc (sizeof (struct DIR));
	if (dirp) {
		wchar_t wname[PATH_MAX];
		size_t n;

		/* Convert directory name to wide-character string */
		error = dirent_mbstowcs_s (&n, wname, PATH_MAX, dirname, PATH_MAX);
		if (!error) {

			/* Open directory stream using wide-character name */
			dirp->wdirp = _wopendir (wname);
			if (dirp->wdirp) {
				/* Directory stream opened */
				error = 0;
			} else {
				/* Failed to open directory stream */
				error = 1;
			}

		} else {
			/* 
			 * Cannot convert file name to wide-character string.  This
			 * occurs if the string contains invalid multi-byte sequences or
			 * the output buffer is too small to contain the resulting
			 * string.
			 */
			error = 1;
		}

	} else {
		/* Cannot allocate DIR structure */
		error = 1;
	}

	/* Clean up in case of error */
	if (error  &&  dirp) {
		free (dirp);
		dirp = NULL;
	}

	return dirp;
}

/*
 * Read next directory entry.
 *
 * When working with text consoles, please note that file names returned by
 * readdir() are represented in the default ANSI code page while any output to
 * console is typically formatted on another code page.  Thus, non-ASCII
 * characters in file names will not usually display correctly on console.  The
 * problem can be fixed in two ways: (1) change the character set of console
 * to 1252 using chcp utility and use Lucida Console font, or (2) use
 * _cprintf function when writing to console.  The _cprinf() will re-encode
 * ANSI strings to the console code page so many non-ASCII characters will
 * display correcly.
 */
static struct dirent*
readdir(
	DIR *dirp) 
{
	WIN32_FIND_DATAW *datap;
	struct dirent *entp;

	/* Read next directory entry */
	datap = dirent_next (dirp->wdirp);
	if (datap) {
		size_t n;
		int error;

		/* Attempt to convert file name to multi-byte string */
		error = dirent_wcstombs_s(
			&n, dirp->ent.d_name, PATH_MAX, datap->cFileName, PATH_MAX);

		/* 
		 * If the file name cannot be represented by a multi-byte string,
		 * then attempt to use old 8+3 file name.  This allows traditional
		 * Unix-code to access some file names despite of unicode
		 * characters, although file names may seem unfamiliar to the user.
		 *
		 * Be ware that the code below cannot come up with a short file
		 * name unless the file system provides one.  At least
		 * VirtualBox shared folders fail to do this.
		 */
		if (error  &&  datap->cAlternateFileName[0] != '\0') {
			error = dirent_wcstombs_s(
				&n, dirp->ent.d_name, PATH_MAX, 
				datap->cAlternateFileName, PATH_MAX);
		}

		if (!error) {
			DWORD attr;

			/* Initialize directory entry for return */
			entp = &dirp->ent;

			/* Length of file name excluding zero terminator */
			entp->d_namlen = n - 1;

			/* File attributes */
			attr = datap->dwFileAttributes;
			if ((attr & FILE_ATTRIBUTE_DEVICE) != 0) {
				entp->d_type = DT_CHR;
			} else if ((attr & FILE_ATTRIBUTE_DIRECTORY) != 0) {
				entp->d_type = DT_DIR;
			} else {
				entp->d_type = DT_REG;
			}

			/* Reset dummy fields */
			entp->d_ino = 0;
			entp->d_reclen = sizeof (struct dirent);

		} else {
			/* 
			 * Cannot convert file name to multi-byte string so construct
			 * an errornous directory entry and return that.  Note that
			 * we cannot return NULL as that would stop the processing
			 * of directory entries completely.
			 */
			entp = &dirp->ent;
			entp->d_name[0] = '?';
			entp->d_name[1] = '\0';
			entp->d_namlen = 1;
			entp->d_type = DT_UNKNOWN;
			entp->d_ino = 0;
			entp->d_reclen = 0;
		}

	} else {
		/* No more directory entries */
		entp = NULL;
	}

	return entp;
}

/*
 * Close directory stream.
 */
static int
closedir(
	DIR *dirp) 
{
	int ok;
	if (dirp) {

		/* Close wide-character directory stream */
		ok = _wclosedir (dirp->wdirp);
		dirp->wdirp = NULL;

		/* Release multi-byte character version */
		free (dirp);

	} else {

		/* Invalid directory stream */
		dirent_set_errno (EBADF);
		ok = /*failure*/-1;

	}
	return ok;
}

/*
 * Rewind directory stream to beginning.
 */
static void
rewinddir(
	DIR* dirp) 
{
	/* Rewind wide-character string directory stream */
	_wrewinddir (dirp->wdirp);
}

/* Convert multi-byte string to wide character string */
static int
dirent_mbstowcs_s(
	size_t *pReturnValue,
	wchar_t *wcstr,
	size_t sizeInWords,
	const char *mbstr,
	size_t count)
{
	int error;

#if defined(_MSC_VER)  &&  _MSC_VER >= 1400

	/* Microsoft Visual Studio 2005 or later */
	error = mbstowcs_s (pReturnValue, wcstr, sizeInWords, mbstr, count);

#else

	/* Older Visual Studio or non-Microsoft compiler */
	size_t n;

	/* Convert to wide-character string (or count characters) */
	n = mbstowcs (wcstr, mbstr, sizeInWords);
	if (!wcstr  ||  n < count) {

		/* Zero-terminate output buffer */
		if (wcstr  &&  sizeInWords) {
			if (n >= sizeInWords) {
				n = sizeInWords - 1;
			}
			wcstr[n] = 0;
		}

		/* Length of resuting multi-byte string WITH zero terminator */
		if (pReturnValue) {
			*pReturnValue = n + 1;
		}

		/* Success */
		error = 0;

	} else {

		/* Could not convert string */
		error = 1;

	}

#endif

	return error;
}

/* Convert wide-character string to multi-byte string */
static int
dirent_wcstombs_s(
	size_t *pReturnValue,
	char *mbstr,
	size_t sizeInBytes, /* max size of mbstr */
	const wchar_t *wcstr,
	size_t count)
{
	int error;

#if defined(_MSC_VER)  &&  _MSC_VER >= 1400

	/* Microsoft Visual Studio 2005 or later */
	error = wcstombs_s (pReturnValue, mbstr, sizeInBytes, wcstr, count);

#else

	/* Older Visual Studio or non-Microsoft compiler */
	size_t n;

	/* Convert to multi-byte string (or count the number of bytes needed) */
	n = wcstombs (mbstr, wcstr, sizeInBytes);
	if (!mbstr  ||  n < count) {

		/* Zero-terminate output buffer */
		if (mbstr  &&  sizeInBytes) {
			if (n >= sizeInBytes) {
				n = sizeInBytes - 1;
			}
			mbstr[n] = '\0';
		}

		/* Lenght of resulting multi-bytes string WITH zero-terminator */
		if (pReturnValue) {
			*pReturnValue = n + 1;
		}

		/* Success */
		error = 0;

	} else {

		/* Cannot convert string */
		error = 1;

	}

#endif

	return error;
}

/* Set errno variable */
static void
dirent_set_errno(
	int error)
{
#if defined(_MSC_VER)  &&  _MSC_VER >= 1400

	/* Microsoft Visual Studio 2005 and later */
	_set_errno (error);

#else

	/* Non-Microsoft compiler or older Microsoft compiler */
	errno = error;

#endif
}


#ifdef __cplusplus
}
#endif
#endif /*DIRENT_H*/




#endif